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ERF(3)		       FreeBSD Library Functions Manual			ERF(3)

NAME
     erf, erff,	erfl, erfc, erfcf, erfcl -- error function operators

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     double
     erf(double	x);

     float
     erff(float	x);

     long double
     erfl(long double x);

     double
     erfc(double x);

     float
     erfcf(float x);

     long double
     erfcl(long	double x);

DESCRIPTION
     These functions calculate the error function of x.

     The erf(),	erff(),	and erfl() functions calculate the error function of
     x;	where

	   erf(x) = 2/sqrt(pi)*integral	from 0 to x of exp(-t*t) dt.

     The erfc(), erfcf(), and erfcl() functions	calculate the complementary
     error function of x; that is erfc() subtracts the result of the error
     function erf(x) from 1.0.

SEE ALSO
     math(3)

HISTORY
     The erf() and erfc() functions appeared in	4.3BSD.

FreeBSD	11.1			 July 13, 2014			  FreeBSD 11.1

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY

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